Manufacturing method for LED emitter with high color consistency

摘要

A method is provided for forming multiple-LED (light-emitting-diode) light emitters from a plurality of LEDs, wherein the number of LEDs in each emitter is an integer M. The method includes providing a plurality of LEDs, each of the LEDs characterized by a first parameter and a second parameter, which are related to color coordinates CIEx and CIEy in a chromaticity diagram. The method also includes determining first and second parameter X0 and Y0 for a target color. The method further includes, for all possible combinations of M LEDs out of the plurality of LEDs, determining a first group parameter and a second group parameter based on the first and second parameters for all of the M LEDs, and selecting a group of M LEDs whose first group parameter and second group parameter are closest to X0 and Y0 as a candidate for forming a light emitter of M LEDs.

主权项

1. A method for forming light emitters with multiple LEDs (light-emitting-diodes), wherein the number of LEDs in each emitter is an integer M, the method comprising:
determining color coordinates CIEx and CIEy and intensity for each of a plurality of LEDs, wherein CIEx and CIEy are color coordinates in a CIE chromaticity diagram, and wherein N is the number of LEDs in the plurality of LEDs; determining a first parameter X0 and a second parameter Y0 for a target light color, wherein X0 and Y0 are related to CIEx and CIEy of each of the N LEDs and a weighting factor related to the intensity of each of the N LEDs; for each possible group of M LEDs out of the N LEDs in the plurality of LEDs:
determining a first group parameter X and a second group parameter Y, wherein X and Y are related to CIEx and CIEy of each of the M LEDs and a weighting factor related to the intensity of each of the M LEDs; anddetermining a difference between the first and second group parameters X and Y of each LED in the group of M LEDs and X0 and Y0; selecting a first group of M LEDs whose first group parameter X and second group parameter Y are closest to X0 and Y0 as a first candidate for forming a light emitter with M LEDs; removing the selected first group of M LEDs from the plurality of LEDs; and for the LEDs remaining in the plurality of LEDs, repeating the above processes to select a group of M LEDs as the next candidate for forming a light emitter.